JP5482374B2 - Broadcast receiver - Google Patents

Description

  The present invention relates to a broadcast receiving apparatus that receives broadcast waves, and more particularly, to a broadcast receiving apparatus that extracts and notifies disaster information contained in broadcast waves.

  In recent years, terrestrial digital broadcasting exists as one of digital broadcasting. In Japan, the current terrestrial analog broadcasting is scheduled to end in 2011, and a transition to terrestrial digital broadcasting is underway. Along with this, broadcast receivers for mobile bodies mounted on car navigation systems and mobile phones have been widely developed.

  As an information distribution service using broadcast waves of terrestrial digital broadcasting, practical use of a disaster information distribution service in the event of a disaster has been promoted. As a typical disaster information distribution service, for example, there is an emergency earthquake bulletin started to be implemented from October 1, 2007 in Japan. Earthquake early warning is a disaster information distribution service that is implemented when an earthquake occurs.

  Several proposals have been made for the method of transmitting the earthquake early warning using terrestrial digital broadcasting. One of them is a transmission method using an AC (Auxiliary Channel) signal. The AC signal uses a modulation method that has better noise characteristics than TS (Transport Stream) that transmits video, audio, and the like. The AC signal has a characteristic that information is completed in one frame (= 204 OFDM symbols) without time interleaving.

  For this reason, it is possible to decode on the receiving side earlier than video and audio. It also has better noise (multipath) characteristics than signals including images and sounds. Therefore, even if there is so much noise that image and sound cannot be restored, it is possible to restore with high probability and detect an earthquake early warning.

  In other words, by using the AC signal, it is possible to detect the earthquake early warning without determining whether the selected broadcast can be received, that is, without specifying the receiving broadcast station, service, image, sound, etc. Is possible.

  The broadcast receiving apparatus that has detected the emergency earthquake bulletin notifies the user (hereinafter referred to as “user”) of the broadcast receiving apparatus by, for example, displaying an image on a liquid crystal panel, outputting sound through a speaker, or the like. It is important to carry out this notification as soon as possible after detecting the earthquake early warning. In other words, it is not desirable that the notification is not performed until the broadcasting station transmitting the emergency earthquake bulletin can be identified.

  In relation to the above, Patent Document 1 discloses a broadcast receiving apparatus capable of informing a user whether or not emergency information can be reliably received. This broadcast receiving apparatus extracts an AC signal from a terrestrial digital broadcast wave. Then, one or more of information indicating received power or received electric field strength, symbol synchronization detection information, MER (Modulation Error Ratio) information, and emergency information synchronization establishment information is detected. Based on the detected value, the level meter value indicating the emergency information reception state is determined. Thus, the user can know in advance whether or not the broadcast receiving apparatus can receive the emergency information without turning on the power of the broadcast receiving apparatus.

JP 2009-296575 A

  However, when the conventional broadcast receiving apparatus as disclosed in Patent Document 1 is used while being transported by a moving body such as a vehicle (for example, when incorporated in a car navigation apparatus), the reception state due to movement is It is necessary to adapt to change.

  In terrestrial digital broadcasting, a relay station receives a radio wave transmitted from a master station and retransmits it from the relay station in order to realize the same broadcast in a wide area. As one of these, a single frequency network (SFN-Single Frequency Network) relaying in the same frequency band has been proposed. However, it is difficult to realize the same broadcast with only SFN due to the problem of interference due to delayed waves. For this reason, the actual situation is that it is operated by MFN (Multi Frequency Network) using a plurality of frequencies.

  Therefore, in particular, a mobile broadcast receiving apparatus maintains a table indicating the physical channel of the relay station for each broadcast station, and when an arbitrary broadcast station is selected by a user operation, the physical included in the table is stored. Some have a channel search function (hereinafter referred to as “manual search function”).

  Also, some broadcast receivers have a function (hereinafter referred to as “automatic search function”) that automatically searches for a relay station or affiliated station and switches to a physical channel with a good reception state when the reception state deteriorates. is there.

  For example, in the case of an in-vehicle broadcast receiving apparatus, the reception state changes every moment depending on the position, speed, etc. of the vehicle during traveling. As the boundary between the current broadcast area and the destination area approaches, it becomes difficult to receive broadcast waves directed to the current broadcast area. Then, it becomes possible to receive broadcast waves directed to the destination area. The automatic search function is effective in such a boundary region.

In the search process, there are several conditions for determining that reception is not possible. Examples include the following.
1. Image and audio information (TS) cannot be acquired.
2. A broadcast station different from the broadcast station selected by the user is received.

  Except when there is no radio wave, the above determination is completed later than the detection of the earthquake early warning by the AC signal. That is, it is determined that the earthquake early warning is detected but cannot be received, and another physical channel is searched immediately after displaying the emergency earthquake early warning.

  As a result, there is a possibility that the search is continued until reception is possible, and the same emergency earthquake warning is displayed every time a physical channel to which the earthquake early warning is transmitted is searched. For this reason, there is a problem that the user feels bothered during the search.

  If it is controlled to display the earthquake early warning after detecting a receivable physical channel, the original purpose of quickly displaying the earthquake information after detecting the earthquake early warning cannot be achieved.

  The present invention has been made to solve the above-mentioned problem, and its purpose is to provide a notification with overlapping contents while maintaining a function to promptly notify at the timing of detecting an earthquake early warning. An object of the present invention is to provide a broadcast receiving apparatus that can be avoided.

In order to achieve the above object, a broadcast receiving apparatus of the present invention includes a broadcast receiving unit that selects and receives a broadcast wave, and a broadcast wave that is estimated to be the same as or similar to the broadcast wave selected by the broadcast receiving unit. A search unit that gives a channel selection instruction to the broadcast reception unit based on the search result, a disaster information extraction unit that extracts disaster information from broadcast waves received by the broadcast reception unit, and an information recording in the broadcast receiving apparatus and a recording unit for performing the channel selection is performed by the broadcast receiving unit, and when the disaster information extraction unit by extraction of the disaster information is performed, the information included in the disaster information a history acquisition unit that records in the recording unit as the history information, the history acquisition unit, the channel information indicating a frequency band of the broadcast wave used for transmission of the disaster information, in the information extracted from the disaster information Ri and disaster detailed information indicating the details of the accident is recorded in the recording unit as the history information, the channel selection is performed by the broadcast receiving unit, and when the disaster information extraction unit by extraction of the disaster information is performed In addition, it is determined whether or not the disaster information and the history information included in the disaster information extracted from the disaster information extracted by the search unit channel information and the channel selection instructed by the search unit, And a notification control unit that performs notification based on the disaster information when they do not match and does not perform notification based on the disaster information when they match .

According to this configuration, the broadcast receiving apparatus of the present invention includes a broadcast receiving unit that selects and receives broadcast waves. Further, a search unit is provided that searches for a broadcast wave that is estimated to be the same as or similar to the selected broadcast wave, and gives a channel selection instruction to the broadcast receiving unit based on the search result. In addition, a disaster information extraction unit is provided that extracts predetermined disaster information from broadcast waves received by the broadcast reception unit. A recording unit for recording information is also provided. In addition, when channel selection is performed and disaster information is extracted, a history acquisition unit is provided that extracts predetermined information from the information included in the disaster information and records the information as history information in the recording unit. Further, the history acquisition unit records the channel information indicating the frequency band of the broadcast wave used for transmission of the disaster information and the disaster detailed information indicating the details of the disaster as history information in the recording unit. In addition , when channel selection is performed by the broadcast receiving unit and disaster information extraction is performed by the disaster information extracting unit, the channel information instructed by the search unit and the channel selection destination by the search unit are extracted. In addition, it is determined whether or not the detailed disaster information included in the disaster information and the history information match, and if they do not match, notification based on the disaster information is performed, and if they match, notification control based on the disaster information is not performed. A part. Thereby, notification of overlapping disaster information can be avoided.

In order to achieve the above-mentioned object, the notification control unit receives the AC (Auxiliary) being received.
If the channel detailed information included in the channel information and the AC signal of the (Channel) signal and the channel information and the detailed disaster information included in the history information coincide with each other, it is determined that the information is the same as the already notified emergency earthquake warning. It is characterized by that.

According to this configuration, the broadcast control device provided in the broadcast receiving apparatus of the present invention includes the channel information of the AC signal being received and the disaster detailed information included in the AC signal, and the channel information and disaster detailed information included in the history information. If they match, it is determined that the information is the same as the already notified emergency earthquake warning .

In order to achieve the above object, the notification control unit displays the disaster information if the channel information and the disaster detailed information included in the history information do not match, and the channel information and the disaster detailed information are displayed. If they match, the disaster information is not displayed .

According to this configuration, distribution intellectual control unit broadcast receiving apparatus comprising the present invention, unless the channel information and the disaster details matches included in the history information to display the disaster information, the channel information and the When the detailed disaster information matches, the disaster information is not displayed .

  According to the present invention, when a predetermined broadcast wave cannot be received due to the movement of the broadcast receiving apparatus, or when a channel selection operation is performed by the user, a broadcast wave of the same series as this broadcast wave is searched. When overlapping disaster information is broadcast on the same series of broadcast waves, notification of overlapping disaster information is not performed. Thereby, the disaster information which overlaps at the time of a search is alert | reported repeatedly, and the problem of making a user feel troublesome can be avoided.

  Further, according to the present invention, it is possible to notify non-overlapping disaster information before determining whether image / sound included in a broadcast wave can be reproduced or not, while avoiding notification of overlapping disaster information. Thereby, when the content of disaster information is updated, disaster information can be alert | reported rapidly.

It is a block diagram which shows the internal structure of the broadcast receiver which concerns on one Embodiment of this invention. It is a table figure which shows the earthquake early warning table which concerns on 1st embodiment of this invention. It is a table figure which shows the emergency earthquake bulletin table which concerns on 2nd embodiment of this invention. It is a screen figure which shows the channel selection screen which concerns on one Embodiment of this invention. It is a flowchart which shows the alerting | reporting control process which concerns on one Embodiment of this invention.

Embodiments of the present invention will be described below with reference to the drawings. In addition, embodiment shown here is an example and this invention is not limited to embodiment shown here.
[Embodiment 1]
<1-1. Internal configuration>
FIG. 1 is a block diagram showing an internal configuration of an in-vehicle television 100 (= broadcast receiving device) according to an embodiment of the present invention. As shown in the block diagram of FIG. 1, the in-vehicle television 100 of the present invention includes at least a control unit 11, an OSD (On Screen Display) processing unit 12, a recording unit 13, an operation unit 14, and an LCD (Liquid Crystal Display) 15. (= Display unit), display control unit 16 (= display unit), speaker 17 (= audio output unit), digital antenna 18 (= broadcast receiving unit), digital tuner 19 (= broadcast receiving unit), and digital broadcast processing unit 20 (= broadcast receiving unit).

  The control unit 11 organically controls driving of each member of the in-vehicle television 100, and performs overall control of broadcast reception processing and the like. In addition, the control unit 11 includes a search unit 11a to a notification control unit 11d as functional units realized by executing a predetermined program on the arithmetic processing device provided in the control unit 11. Details of processing performed by each functional unit will be described later.

  The OSD processing unit 12 draws an image for EPG (Electronic Program Guide), a notification image indicating the received earthquake early warning, and the like. The image drawn by the OSD processing unit 12 is given to the display control unit 16 and displayed on the LCD 15. Various image data and text data used by the OSD processing unit 12 for drawing are recorded in the recording unit 13 in advance. Alternatively, data included in a digital broadcast wave received by the digital antenna 18 can be used.

  The recording unit 13 is a recording medium for recording various data. The recording unit 13 can provide a plurality of recording areas for each type of data to be recorded. In the example shown in FIG. 1, the recording unit 13 is configured to include at least an application recording area 13a and an earthquake information recording area 13b.

  The application recording area 13a is an area for recording various programs (for example, a reception control program) executed in the in-vehicle television 100. The application recording area 13a is also used for recording a channel list for each area, various setting information for notifying the earthquake early warning, and the like.

  The earthquake information recording area 13b is used for recording earthquake information extracted from an AC signal by an earthquake information extraction unit 11b described later. Further, it is an area for recording an emergency earthquake bulletin table generated by the table management unit 11c, which will be described later, and information temporarily used for generating the emergency earthquake bulletin table, such as a physical channel of a broadcast wave.

  The operation unit 14 is an interface for a user to perform a channel selection instruction, a channel setting instruction, or the like for the in-vehicle television 100. The operation unit 14 is configured to include, for example, a plurality of push buttons, touch sensors, and the like. Or the structure containing the touchscreen (not shown) provided in the back surface of LCD15 may be sufficient.

  The LCD 15 is a display device that displays various types of information held by the in-vehicle television 100, such as an EPG image, a television broadcast reception image, or an emergency earthquake warning notification image. The display control unit 16 encodes the image data into a signal that matches the signal format of the LCD 15, performs D / A conversion, and outputs an image signal. The image signal output from the display control unit 16 is sent to the LCD 15 and displayed as an image.

  The speaker 17 is a loudspeaker for outputting a sound based on an analog sound signal obtained by a sound processing unit (not shown) decoding sound data and performing D / A conversion. As audio data to be used, audio data decoded by the digital broadcast processing unit 20, audio data recorded in advance in the recording unit 13, or the like is used.

  The digital antenna 18 is an antenna for receiving digital broadcasts, and for example, a plurality of diversity antennas are used. The digital tuner 19 is for selecting and demodulating broadcast waves received by the digital antenna 18 and outputting TS (Transport Stream) and AC signals.

  Further, the digital tuner 19 monitors whether or not the broadcast wave being selected cannot be received. Specifically, for example, it is considered that reception is disabled when the electric field intensity of the broadcast wave received so far falls below a predetermined threshold due to, for example, a vehicle on which the in-vehicle television 100 is mounted straddling a reception area.

The digital broadcast processing unit 20 separates and decodes image data, audio data, additional data, and the like from the TS output from the digital tuner 19. Various data obtained by decoding are sent to the control unit 11, the display control unit 16, or the speaker 17 described above.
<1-2. Channel selection screen>
Here, a channel selection screen according to an embodiment of the present invention will be described with reference to the screen diagram of FIG.

  FIG. 4 shows a channel selection screen 90 for the user to perform a channel selection operation on the in-vehicle television 100. The channel selection screen 90 can be called up by the user pressing a channel selection button or the like included in the operation unit 14, for example.

  The channel selection screen 90 of this embodiment includes a channel list 91, a cursor 92, a return button 93, and a re-search button 94.

When the determination key included in the operation unit 14 is pressed while the cursor 92 is positioned on the re-search button 94, the search for the relay station or affiliated station of the currently receiving broadcast station is started. This makes it possible to view the same program as the program currently being viewed at the receiving broadcast station when the reception sensitivity of the receiving broadcast station is reduced and the demodulation of images and sounds is disturbed. Viewing can be continued by switching to another broadcasting station with good reception sensitivity.
<1-3. About the configuration of the function section>
Here, the relationship between the functional units for performing the notification control process according to the first embodiment of the present invention will be described with reference to the block diagram of FIG.

  As shown in FIG. 1, the notification control process of the present embodiment is performed by a search unit 11a, an earthquake information extraction unit 11b (= disaster information extraction unit), a table management unit 11c (= history acquisition unit), and a notification control unit 11d. To be implemented.

  The search unit 11a performs a channel search (hereinafter referred to as “search”) for receiving broadcast waves from a predetermined broadcast station. The search unit 11a includes the above-described manual search function and automatic search function. When the user performs a channel selection operation on the channel selection screen 90, or when the reception sensitivity of the broadcast wave being received has decreased, the digital tuner 19 or When detected by the digital broadcast processing unit 20, a relay station or affiliated station is searched.

  At the above timing, the search unit 11a creates a candidate list indicating a physical channel list to be searched. Then, reception by a physical channel included in the candidate list is tried. As a result of the trial, if reception of a physical channel that broadcasts the same series of programs is successful, reception of broadcast waves is started using this physical channel.

  If reception fails, the search unit 11a extracts an unchecked physical channel from the candidate list and attempts reception. This search is repeated, and if no receivable physical channel is detected, the search is considered to have failed.

  The earthquake information extraction unit 11b extracts earthquake information (= disaster information) that is information related to the emergency earthquake warning from the AC signal included in the broadcast wave. Earthquake information includes, for example, earthquake detection time, earthquake identification number, epicenter name code, epicenter latitude / longitude, epicenter depth, magnitude, maximum predicted seismic intensity, data accuracy (system and processing method used for measurement, etc.) Etc. are included. Normally, since the master station and the relay station transmit the same data, the same AC signal is transmitted.

  When the search by the search unit 11a occurs, the table management unit 11c generates an emergency earthquake bulletin table (= history information) and records it in the recording unit 13. The earthquake early warning table is a table for recording and managing past earthquake information in order to avoid overlapping display of once displayed earthquake information.

  FIG. 2 shows an earthquake early warning table (= history information) of the present embodiment. Data for one line of the earthquake early warning table corresponds to the earthquake information acquired from one AC signal. The contents of “earthquake motion warning information” and “earthquake motion warning detailed information” included in the earthquake early warning table shall conform to ARIB standard STD-B31, which is a standard established by the Japan Radio Industry Association (reference URL) : Http://www.arib.or.jp/tyosakenkyu/kikaku#hoso/hoso#std-b031.html, http://www.soumu.go.jp/main#content/000037088.pdf).

The “update flag” (= update information) included in the earthquake motion warning information is 2-bit flag information and takes one of the values “00”, “01”, “10”, and “11”. If the broadcast station does not send out detailed information on earthquake motion warnings, the broadcast station includes a fixed value of “11” in the update flag. On the other hand, when the detailed earthquake motion warning information is transmitted, any value from “00” to “11” is included in the update flag. The value is incremented by one each time the content of the detailed earthquake motion warning information is updated. When the value is incremented by one in the state of “11”, it returns to “00”. That is, the update flag changes from “00” → “01” → “10” → “11” → “00” → (repeated below).

  If the above mechanism is used, it is possible to determine whether or not the details of the seismic motion warning detailed information have been updated by monitoring the change in the value of the update flag (however, the broadcasting station of the broadcast wave including the AC signal is the same series As a premise).

  “Earthquake motion warning detailed information” (= disaster detailed information) in the figure is information obtained by removing time information that changes every moment from earthquake information included in the AC signal. In the present embodiment, the page type and earthquake motion information included in the earthquake information are acquired as detailed earthquake motion warning information.

  The page type is 1-bit information that takes one of the values 0 and 1. When the page type is 0, the earthquake motion information includes regional information (prefecture code, etc.). When the page type is 1, the earthquake motion information includes the epicenter information (such as the latitude and longitude of the epicenter). As described above, the page type and the earthquake motion information constitute one earthquake motion warning detailed information as a set. When the broadcasting station does not transmit earthquake information, “1” is set in each bit of the earthquake motion information.

  From the above, since a plurality of pieces of earthquake motion warning detailed information may be included in one AC signal, a plurality of “earthquake motion warning detailed information” columns are also provided in the emergency earthquake warning information table.

  An error detection parity bit (= identification information) generated by a checksum, CRC (Cyclic Redundancy Check) or the like may be recorded in the “seismic motion warning detailed information” field. However, in the following embodiments, only the page type and earthquake motion information are recorded.

  The notification control unit 11d determines whether or not the earthquake information has been updated using the emergency earthquake bulletin table. For example, when a search for a relay station is performed by the search unit 11a and a new AC signal is received, by referring to various data in the earthquake early warning table, that is, an update flag and detailed information on earthquake motion, It is determined whether or not there is.

  When a plurality of pieces of detailed earthquake motion warning information are recorded in the emergency earthquake bulletin table, a plurality of check processes are performed for one AC signal. For example, in the example of FIG. 2, first, a check process using the update flag and the earthquake motion warning detailed information 1 is performed, and then a check process using the update flag and the earthquake motion warning detailed information 2 is performed.

  Then, when the update flag and the earthquake motion detailed information included in the emergency earthquake bulletin table match the update flag and the earthquake motion detailed information included in the received AC signal, the notification based on the earthquake information is not performed. On the other hand, if they do not match, it is determined as “new earthquake information” and a notification is made based on the earthquake information.

The notification control unit 11d updates the contents of the emergency earthquake bulletin information table every time a search for a relay station or affiliated station is performed by a predetermined timing, for example, the search unit 11a, and keeps it for a predetermined period. As an example of the predetermined period, for example, a period from when the occurrence of an earthquake early warning is detected until a predetermined time elapses, or a period from the start of search to the end of search is set as the predetermined period.
<1-4. About notification control processing>
Here, the notification control process at the time of receiving the earthquake early warning performed by the in-vehicle television 100 according to the first embodiment of the present invention will be described with reference to the flowchart of FIG.

  In the processing flow of the present embodiment, the earthquake motion warning information and the earthquake motion warning detailed information included in the AC signal being received are compared with the earthquake motion warning information and the earthquake motion warning detailed information included in the emergency earthquake early warning table. And if it corresponds, it will judge that it is the same as the emergency earthquake bulletin which already alert | reported. When comparing the detailed earthquake motion warning information, the page type and the earthquake motion information included in the detailed earthquake motion warning information are compared as a pair.

  The processing flow shown in FIG. 5 is started when the power source of the vehicle-mounted television 100 is activated and a relay station search, affiliated station search, or other search is performed by the search unit 11a. These searches are started, for example, when a decrease in reception sensitivity is detected by the digital tuner 19 or the digital broadcast processing unit 20. Alternatively, it is started when a predetermined user operation, for example, pressing of the re-search button 94 shown in FIG. 4 is detected.

  After the start of this process, the table management unit 11c initializes the earthquake early warning table in step S110. Note that the emergency earthquake bulletin table initialized here is retained during the period in which this processing flow is being performed.

  Next, in step S120, the earthquake information extraction unit 11b determines whether or not an emergency earthquake warning included in the AC signal has been detected. This is determined using, for example, start / end information included in the AC signal. When the emergency earthquake warning is not detected, the process proceeds to step S140 described later. When detected, the earthquake information extraction unit 11b extracts the earthquake information included in the AC signal.

  Next, the table management part 11c updates an emergency earthquake bulletin table in step S130. That is, the earthquake information extracted above is recorded in the emergency earthquake bulletin table initialized in step S110.

  Next, in step S140, the search unit 11a determines whether or not an unsearched physical channel remains. For example, it is assumed that the master station of the broadcasting station A that has been received so far is 13CH, and the relay stations of the broadcasting station A are 14CH, 17CH, and 20CH. In this case, it is determined whether or not the search has been performed for all four channels of the master station and the relay station.

  If no unsearched physical channel remains, this process is terminated. If unsearched physical channels remain, the search unit 11a starts searching for unsearched channels in step S150.

  Next, in step S160, the earthquake information extraction unit 11b determines whether or not earthquake information for emergency earthquake warning is included in the AC signal of the physical channel for which the search has been started in step S150. When earthquake information is not included, the process proceeds to step S200 described later.

  When the earthquake information is included, the notification control unit 11d compares the received earthquake information with the earthquake information recorded in the emergency earthquake bulletin table in step S170. And when both information corresponds, it transfers to step S200 mentioned later. If the two pieces of information do not match, the notification control unit 11d controls the OSD processing unit 12, the display control unit 16, or the speaker 17 so as to notify the earthquake early warning in step S180.

  For example, in the example of FIG. 2, when there is an item that does not match at least one of “update flag”, “page type”, and “earthquake motion information”, an emergency earthquake warning is displayed. If everything matches, the earthquake early warning is not displayed. It should be noted that when there are a plurality of “page types” and “earthquake motion information”, it is desirable to check all of them, and to notify an emergency earthquake warning if there is information that does not match even one of the plurality.

  Next, in step S190, the table management unit 11c updates the emergency earthquake bulletin table by adding the earthquake information used for the notification to the emergency earthquake bulletin table.

  Next, in step S200, the search unit 11a determines whether the broadcast wave from the reception target broadcast station has been successfully received in the searched physical channel. If the reception has failed, the process proceeds to step S140 again. If the reception is successful, the search is terminated and the received broadcast is displayed.

  In the above processing flow, the number of searches for each physical channel is not particularly limited. For example, a search may be repeatedly performed a predetermined number of times between the master station and the relay station. For example, in the above example, the search is performed in the order of 13CH, 14CH, 17CH, 20CH, 13CH (hereinafter repeated).

  In the case of this form, when 13CH, which is the master station, is searched again, it is rechecked whether or not the 13CH includes an emergency earthquake warning. If not included, the earthquake early warning table of this affiliated station is initialized.

  According to the present embodiment described above, when the radio wave condition changes due to movement of the vehicle 1 or the like and the channel being received becomes unreceivable or when a search instruction is given by a user operation, the channel being received Search for channels in the same series as. And when the same earthquake information is broadcast in the same series, overlapping earthquake information is not displayed. Thereby, the same earthquake information is repeatedly performed at the time of a search, and the problem that a user feels troublesome can be avoided.

  According to the present invention, part of the earthquake information acquired from the AC signal is recorded in the emergency earthquake bulletin table, and it is determined whether or not the earthquake information is duplicated. Thereby, it is possible to promptly determine the overlap and notify the earthquake early warning in a stage before determining whether the reception target channel can be received or not.

Next, a second embodiment of the present invention will be described with reference to the drawings.
[Embodiment 2]
<2-1. Internal configuration>
Since it is the same content as Embodiment 1, description is abbreviate | omitted here.
<2-2. Channel selection screen>
Since it is the same content as Embodiment 1, description is abbreviate | omitted here.
<2-3. About the configuration of the function section>
Although it is the same structure as FIG. 1 of Embodiment 1, the functions of the table management part 11c and the alerting | reporting control part 11d are partially different.

  The table management part 11c of this embodiment produces | generates the emergency earthquake bulletin table shown in FIG. 3 when the search by the search part 11a generate | occur | produces. The earthquake early warning table shown in FIG. 3 is different from the earthquake early warning table (FIG. 2) of the first embodiment, and the channel selection operation by the user is performed, and a search for a broadcasting station of a different series from the receiving broadcasting station is performed. When is started, initialization is performed.

  If broadcast stations are different, check information such as update flags and error detection parity bits may differ from broadcast station to broadcast station, so these cannot be used for the determination of duplication of earthquake information. Therefore, it is not necessary to record in the earthquake early warning information table. For this reason, the earthquake early warning information table of this embodiment is extracted from the “physical CH (= channel information)” column indicating the physical channel of the broadcast station searched by the search unit 11a and the AC signal of the physical channel. The “seismic motion warning detailed information” column indicating the page type and seismic motion information included in the seismic information is included. The “seismic motion warning detailed information” column has the same contents as those in the first embodiment, and thus the description thereof is omitted.

Since the emergency earthquake bulletin information table has the above-described configuration, the notification control unit 11d of this embodiment is included in the physical channel searched by the search unit 11a and the earthquake information extracted from the AC signal. The received earthquake information is judged to be duplicated by referring to the page type and the earthquake motion information. The physical channel may be determined based on predetermined information obtained from the received broadcast wave.
<2-4. About notification control processing>
The processing flow is the same as the flow diagram (FIG. 5) of the first embodiment, but the processing contents are partially different. In the processing flow of the present embodiment, if the physical channel of the AC signal being received and the seismic motion warning detailed information included in the AC signal match the physical channel and the seismic motion warning detailed information included in the emergency earthquake early warning table, Judge that it is the same as the earthquake early warning already reported.

  The processing flow of this embodiment is started when the power source of the in-vehicle television 100 is activated and a channel selection operation is performed by a user operation. Therefore, in step S110, the table management unit 11c initializes the emergency earthquake bulletin information table shown in FIG. 3 instead of the emergency earthquake bulletin information table shown in FIG. The comparison process and the update process using the earthquake early warning information table in the subsequent steps are also performed using the earthquake early warning information table shown in FIG.

  In the present embodiment, the contents of the search process in step S140 are different from those in the first embodiment. For example, it is assumed that the parent station of the broadcasting station A received so far is 13CH, the parent station of the broadcasting station B selected by the user operation is 13CH, and the relay stations are 15CH, 18CH, and 21CH. In this case, in step S140, it is determined whether or not the search has been performed for all the four channels. However, even if reception on 13CH is successful, if the broadcast content is that of broadcast station A, the search is considered to have failed and the search is continued.

  In the present embodiment, the contents of the comparison process in step S170 are different from those in the first embodiment. For example, in the example of FIG. 3, when there is an item that does not match at least one of “physical CH”, “page type”, and “earthquake motion information”, an emergency earthquake warning is displayed. If everything matches, the earthquake early warning is not displayed. It should be noted that when there are a plurality of “page types” and “earthquake motion information”, it is desirable to check all of them, and to notify an emergency earthquake warning if there is information that does not match even one of the plurality.

According to the present embodiment described above, when a channel selection instruction is given by a user operation, a search is performed on the master station and relay station of the selected broadcast station. When the same earthquake information is broadcast on the same physical channel, the earthquake information having overlapping contents is not displayed. Thereby, when the search process is repeatedly performed, the same content notification is repeatedly performed, and the problem of making the user feel bothersome can be avoided.
[Other embodiments]
The present invention has been described with reference to the preferred embodiments and examples. However, the present invention is not necessarily limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea. be able to.

  Therefore, the present invention can also be applied to the following embodiments.

  (A) In the above embodiment, the in-vehicle television 100 has been described as an example of the broadcast receiving apparatus that performs the notification control processing of the present invention. However, the broadcast receiving apparatus may be implemented in other broadcast receiving apparatuses. For example, the embodiment may be implemented with a portable television, a mobile phone, a digital radio, or the like.

  (B) In the above embodiment, each functional unit related to various processes of the present invention is realized by executing a predetermined program on an arithmetic processing unit such as a microprocessor. It may be a form realized by.

  (C) In the above-described embodiment, the broadcast receiving apparatus and the display unit are described as an example in which they are housed in the same housing. However, they are not necessarily the same housing. For example, the broadcast receiving device may be an STB (Set Top Box), and an image signal and an audio signal generated based on the earthquake early warning may be output to an external display device or the like.

  (D) In the above embodiment, an AC signal of digital terrestrial broadcasting is described as an example of a signal including earthquake information. However, the present invention is applied to a broadcast receiving apparatus that acquires earthquake information from other signals. The form to implement may be sufficient. For example, earthquake information is acquired from a predetermined signal (for example, a vertical blanking period signal in the case of analog broadcasting) included in a broadcast wave such as BS (Broadcasting Satellite) digital broadcasting, CS (Communications Satellite) digital broadcasting, or analog broadcasting. In the broadcast receiving apparatus, the present invention may be implemented. In this case, the type of information recorded in the earthquake early warning table is appropriately changed according to the information used for duplication determination.

  (E) In the above embodiment, the specific method for notifying the earthquake early warning is not particularly limited. For example, the OSD processing unit 12 displays a predetermined character image or map image based on the earthquake information. The image signal is generated, and the image signal is transmitted to the display control unit 16 so that an image related to the earthquake early warning is displayed on the LCD 15. Or the form which outputs a predetermined warning sound and synthetic | combination sound from the speaker 17 may be sufficient.

  (F) In the above embodiment, the emergency earthquake bulletin table in FIG. 2 is used when searching for a relay station as in the first embodiment, and different broadcasts that are not affiliated stations or affiliated stations as in the second embodiment. The emergency earthquake bulletin table in FIG. 3 is used when searching for stations, but the emergency earthquake bulletin table in FIGS. 2 and 3 may be properly used according to the type of search to be performed or the details of the search process. Good.

  (G) In the above embodiment, the earthquake information related to the emergency earthquake warning is described as an example of the disaster information extracted by the broadcast receiving apparatus of the present invention. If it exists, the form which implements this invention for information other than this may be sufficient. For example, it may be implemented for disaster information such as tsunami information, typhoon information, and tornado information.

100 In-vehicle TV (broadcast receiver)
11 Control unit 11a Search unit 11b Earthquake information extraction unit (disaster information extraction unit)
11c Table management unit (history acquisition unit)
11d Notification control unit 12 OSD processing unit 13 Recording unit 14 Operation unit 15 LCD (display unit)
16 Display control unit (display unit)
17 Speaker (Audio output unit)
18 Digital antenna (broadcast receiver)
19 Digital tuner (broadcast receiver)
20 Digital broadcast processing section (broadcast receiving section)

Claims (3)

A broadcast receiver for selecting and receiving broadcast waves;
A search unit that searches for a broadcast wave that is estimated to be the same or similar to the broadcast wave selected by the broadcast reception unit, and that provides a channel selection instruction to the broadcast reception unit based on the search result ;
A disaster information extraction unit that extracts disaster information from broadcast waves received by the broadcast reception unit;
In a broadcast receiving device comprising a recording unit for recording information,
Wherein the performed channel selection by the broadcast receiving unit, and when the disaster information extraction unit by extraction of the disaster information is performed, the history acquisition to be recorded in the recording unit of information included in the disaster information as history information And
The history acquisition unit uses the channel information indicating the frequency band of the broadcast wave used for the transmission of the disaster information and the disaster detailed information indicating the details of the disaster as information extracted from the disaster information as the history information. Record in the recording section ,
When channel selection is performed by the broadcast receiving unit and the disaster information is extracted by the disaster information extracting unit, the channel information instructed to be selected by the search unit and the channel selection destination by the search unit It is determined whether or not the disaster detailed information included in the extracted disaster information matches the history information. If they do not match, notification is made based on the disaster information, and if they match, based on the disaster information that a not performed notifying the notification control unit release transceiver. If the channel information and disaster detailed information included in the history information match the channel information and disaster detailed information included in the history information, the notification control unit has already received the AC (Auxiliary Channel) signal. The broadcast receiving apparatus according to claim 1, wherein the broadcast receiving apparatus is determined to be the same as the notified emergency earthquake warning . The notification control unit displays the disaster information if the channel information and the disaster detailed information included in the history information do not match, and if the channel information and the disaster detailed information match, the disaster information is displayed. The broadcast receiving apparatus according to claim 1, wherein the broadcast receiving apparatus is not displayed .

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